#import sys
#str = sys
#print(str)
#num = input("请输入第一个数字:")
#print(num)
#sys.stdout.write('Hello')
#print('world')
file = open('a.txt','r',buffering=1,encoding='utf-8')
print(file.read())
file.close()
with open('a.txt','r',buffering=1,encoding='utf-8') as file:
    print(file.read())
with open('a.txt','w',encoding='utf-8') as file2:
    print(file2.readlines())
with open('a.txt','r',encoding='utf-8') as file3:
    print(file3.readlines())
with open('a.txt','a',encoding='utf-8') as file3:
    file3.write('1111hello')